/*
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is
 *
 * java-concurrency-presentation:
 * concurrency presentation tutorial.
 *
 * The Initial Developer of the Original Code is
 * Marco Antonio Villalobos, Jr.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): None.
 *
 * ***** END LICENSE BLOCK *****
 */

package presentation.concurrency.slides;

/**
 * This class represents an thread unsafe account balance implementation.
 */
public class Account {

    /** The unique account number that belongs to an individual or company. */
    private final long accountNo;

    /** The account balance (how much that is in this account. */
    private double balance;

    /**
     * Creates an instance of this account number.
     *
     * @param accountNo The account number that belongs to the individual or company.
     * @param balance The account balance.
     */
    public Account(long accountNo, double balance) {
        this.accountNo = accountNo;
        this.balance = balance;
    }

    /**
     * Changes the account balance by the given amount.
     *
     * The amount could be positive or negative.  The balance will change
     * by plus or minus the amount.
     *
     * If the amount is negative, this is a withdrawal.
     * If the amount is positive, this is a deposit.
     *
     * @param amount The amount to add or subtract from the balance.
     */
    public void changeBalance (double amount) {
        balance += amount;
    }

    /**
     * Retrieves account balance (how much that is in this account.
     *
     * @return The account balance.
     */
    public double getBalance() {
        return balance;
    }

    /**
     * Retrieves account balance (how much that is in this account.
     *
     * @return The account balance.
     */
    public long getAccountNo() {
        return accountNo;
    }
}